Waste water treating device

A waste water treating device comprising:

• a combustion chamber having
• an inlet passage by which combustible wastes of waste water and sludge are inserted into the combustion chamber,
• a burner for burning the wastes while evaporating waste water and incinerating the sludge within a waste incineration part of the combustion chamber,
• an outlet for taking ashes out of the combustion chamber and
• a gas outlet for discharging combustion gas from the combustion chamber;
• a waste water supplier for supplying the waste water from a collecting tank into the combustion chamber having:
• a pump for the collecting tank,
• a storage tank for temporarily storing the waste water supplied from the waste water collecting tank by said pump prior to injecting the waste water into said combustion chamber, and
• an ejector for discharging the waste water from said supplier into said combustion chamber through a plurality of nozzles;
• a dust collector including:
• an exhaust pipe for exhausting the combustion gas from said combustion chamber gas outlet into the atmosphere, and
• a dust treating and collecting chamber for collecting and treating dust from the combustion gas before the combustion gas is discharged from the exhaust pipe into the atmosphere;
• and
• a sludge separator installed at a position between said supplier and said ejector for electrically separating the sludge from the waste water prior to directly feeding the sludge into the combustion chamber and feeding the diluted waste water to said ejector, said sludge separator comprising:
• a collecting tank connected to an upper end of a supplying pipe at its bottom wall, with a lower end of said supplying pipe being positioned within said combustion chamber;
• a separating tank mounted within said collecting tank and connected to a conveying pipe of said supplier at its sidewall and to a diluted waste water conveying pipe at its bottom wall;
• a plurality of separating rollers rotatably mounted within an upper portion of said separating tank with a part of said separating rollers to be immersed in the waste water of said separating tank, said separating rollers being selectively turned on so as to become electromagnets capable of attracting the sludge thereon;
• and
• a plurality of blades for scraping the sludge-on said separating rollers prior to dropping the sludge into said collecting tank, said blades being inclinedly mounted to an upper portion of said separating tank at opposite positions in a way such that each blade is inclined downwardly from an inside end to an outside end thereof, with the inside end being positioned close to an associated separating roller and the outside end being positioned within said collecting tank.